Question

2. If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for both of them to paint the house together?

A. 2 hours and 24 minutes
B. 3 hours and 12 minutes
C. 3 hours and 44 minutes
D. 4 hours and 10 minutes
E. 4 hours and 33 minutes

Answer 1

this is how far i am 1/4+1/6=5/12 then what is next after this?

Answer 2

1/4 + 1/6 = 1/t

5/12 = 1/t

5t = 12

keep going to solve for t to get your final answer

Answer 3

how did you know it was 1/t?

Answer 4

because if they get the job done together in t hours, then their combined rate is 1/t jobs per hour

Answer 5

how could i remeber that somehow?

Answer 6

you can think of it as

rate * time = (amount of work done)

and you can think of

"amount of work done"

to be the value of 1 (to signify you have done 1 full completed job)

Answer 7

then you solve for the rate to get

rate = (amount of work done)/(time)

r = 1/t

Answer 8

thank guys for coming you guys are alway there when i need help thxss

Answer 9

np

Answer 10

oh yeah how did you guys get so many points?

Answer 11

just by answering questions

Answer 12

how mnay years? or months?

Answer 13

idk lost count lol, but a while though

idk if it's been years though

Answer 14

lol